5261987 has 4 divisors (see below), whose sum is σ = 5280240. Its totient is φ = 5243736.

The previous prime is 5261983. The next prime is 5261989. The reversal of 5261987 is 7891625.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5261987 - 2² = 5261983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5261987.

It is not an unprimeable number, because it can be changed into a prime (5261983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8687 + ... + 9272.

It is an arithmetic number, because the mean of its divisors is an integer number (1320060).

Almost surely, 2^5261987 is an apocalyptic number.

5261987 is a deficient number, since it is larger than the sum of its proper divisors (18253).

5261987 is a wasteful number, since it uses less digits than its factorization.

5261987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18252.

The product of its digits is 30240, while the sum is 38.

The square root of 5261987 is about 2293.9021339194. The cubic root of 5261987 is about 173.9335083064.

The spelling of 5261987 in words is "five million, two hundred sixty-one thousand, nine hundred eighty-seven".